Membrane processes dialysis

Klein, Ward, and Lacey, Membrane Processes—Dialysis and Electro-Dialysis in Rousseau, Handbook of Sepaiation Piocess Technology, Wiley, 1987. 

The diameter or the radius of the pores is one of the most important geometric characteristic of porous solids. In terms of lUPAC nomenclature, we can have macropores (mean pore size greater than 5 x 10 m), mesopores (between 5 x 10 and 2 x 10 m) and micropores (less than 2 x 10 m). The analysis of species transport inside the porous structure is very important for the detailed description of many unit operations or applications among them we can mention suspension filtration, solid drying and humidification, membrane processes (dialysis, osmosis, gaseous permeation. ), flow in catalytic beds, ion exchange, adsorp-... 

Klein E, Ward RA, and Lacey RE. Membrane processes—dialysis and electrodialysis. In Rousseau RW, Ed. Handbook of Separation Process Technology, John Wiley Sons, Wiley-Interscience, New York, 1987, pp. 954-981. 

Dialysis is not used very often in environmental applications, but a brief discussion is useful to compare it to other types of membrane processes. Dialysis separates solutes of different ionic or molecular size in a solution. The driving force is a difference in solute concentration across the membrane. The smaller ions and molecules will pass through the membrane, but the bigger particles cannot make it through the pore openings. 

Klein. E., Ward, R.A., and Lacey, R.E., Membrane Processes - dialysis and electrodialysis, in Handbook of Separation Process Technology , Rousseau, R.W., John Wiley, New York, 1987... 

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